A212815 a(n) = largest number k >= 7 such that A212813(k) = n.

8, 12, 54, 258280326

Offset: 0

Author

N. J. A. Sloane, May 30 2012

Keywords

• nonn

Comments

Bellamy and Cadogan say that a(4) = 2*3^86093441, which is too large to include here.

References

• Bellamy, O. S.; Cadogan, C. C. Subsets of positive integers: their cardinality and maximality properties. Proceedings of the Tenth Southeastern Conference on Combinatorics, Graph Theory and Computing (Florida Atlantic Univ., Boca Raton, Fla., 1979), pp. 167--178, Congress. Numer., XXIII-XXIV, Utilitas Math., Winnipeg, Man., 1979. MR0561043 (82b:10006)

Crossrefs

Cf. A036288, A212813, A212814, A212816, A212908, A212909.